27153922 Peka Sc f1 Set 2 Density
-
Upload
siti-zanirah-arifin -
Category
Documents
-
view
19 -
download
2
Transcript of 27153922 Peka Sc f1 Set 2 Density
PeKA ScienceForm 1
SCIENCE FORM 1 SET 2STUDENT MANUAL
Learning Area : Matter
Learning Objective : Understanding the concept of density
Element 1 : Science Process Skills
Construct : C1, C2, C4, C5, C6, and C8
Instructions:
1. Carry out this activity
a. Put water, petrol, sand and cork in a measuring cylinder.
b. Draw your observation and answer all the questions.
2. Then write a task report.
Activity Report Format:
1. Title : Density and buoyancy of objects
2. Aim : To study the density of solids and liquids.
3. Apparatus/ Material :
4. Procedure :
5. Observation and results:
i) Are cork, petrol, sand and water are matter?
ii) Based on the substances used, which are examples of:
a) solid …………………………….
b) liquid …………………………….
iii) Which substance a) float; b) sink in water?
iv) What property do these substances have that affect their buoyancies?
v) What will happen to the cork if a nail is added to it? Why?
6. Discussion and analysis– answer the questions given.
6.1 i) Why does the substance float on water?
ii) Why does the substance sink in water? Or
iii) Why does the substance float/sink innpetrol?
iv) Arrange these substances in sequence of ascending order based on
their densities. Refer to Table 1.
PeKA ScienceForm 1
6.2. i) Based on the observation and Table 1, what is your inference?
ii) What can be said about the density of a substance that floats in a
more dense liquid?
iii) What can be said about the density of a substance that sinks in a
less dense liquid?
Substance Density [gcm-3]
Mercury 13.6
Ice 0.92
Petrol 0.75
Sand 2.6
Water 1.0
Cork 0.25
Table 1
6.3 i) Using the results and Table1 , predict the position of ice and
mercury if all the substances were put together in a gas jar.
ii) Draw a suitable diagram and label the substances.
6.4 i) Based on the results and Table 1, classify the substances.
Explain the method used.
ii) What other criteria can we use to group them?
7. Conclusion–
What can you conclude from this activity?
Do different substances have the same densities?
Activity Report Checklist:No Content Yes
1. Title2. Aim3. Apparatus4. Procedure5. Observation & Results6. Discussion & analysis7. Conclusion
PeKA ScienceForm 1
Science form 1: Sample Set 2 [Teacher Manual]
1.0 EXPERIMENT 3.6 – Understanding the Concept of Density
2.0 Aim : To study the density of solids and liquids.
3.0 Material : water, cork, sand, petrol, nail
Apparatus : 100 ml measuring cylinder, beaker
4.0 Procedure :
1. I put water, petrol, sand followed by the cork into the
measuring cylinder.
2. I drew what I observed .
5.0 Observation :
√
i) Cork, sand, water and petrol are matter.
ii) Based on the substances used, examples of:
a) solid: cork, sand
b) liquid: petrol, water
iii) cork and petrol floats on water; while sand sinks in water
iv) The density of these substances affect their buoyancies.
v) The cork sinks when a nail is added to it because it becomes denser.
C1:3
C6:3
1a
1b,c,d
1d, 2a1b,4b,8c
1e,4a
petrol
water
cork
sand
8a,5d
√
PeKA ScienceForm 1
6.0 Discussion and analysis.
6.1 i) Cork/petrol floats on water because it is less dense than water
ii) Sand sinks in water because it is more dense than water /or
iii) Cork float on petrol because it is less dense / Water sinks in petrol
because it is more dense than petrol
iv) Sequence of densities of substances in ascending order:
Cork petrol water sand.
6.2 i) The buoyancy of a substance depends on its density
ii) A less dense solid/substance floats in a more dense liquid.
iii) A denser/ more dense substance sinks in a less dense liquid.
6.3
Substance Density [gcm-3]
Cork 0.25
Petrol 0.75
Ice 0.92
Water 1.0
Sand 2.6
Mercury 13.6
i) Using the results and Table 1, the position of ice and
mercury are predicted if all the substances were put together in a gas jar.
Glass
Ice cube
Cork
Petrol
Water
Glass
Ice cube
Cork
Petrol
Water
Sand
8c,d
1f,8bC8:3
8a, also from diagram
4b,8c
4a,8d
C4:3
4c
5 a,b,c,d
8b
C5:3
mercury
√
√
√
PeKA ScienceForm 1
6.4 i) Based on the results and table of densities, the substances are
classified into two groups based on the common property:-
Float on water Do not float on water/ sink in water
Cork Sand
Petrol Mercury
Ice
ii) Another criteria we can use to group the substances is buoyancy of
substance in petrol.
Float on petrol Do not float on petrol/sink in petrol
Cork Water
Ice
Sand
Mercury
7.0 Conclusion:
Different substances have different densities.
2d
2a,b
2c
C2:3√